日期：2012年6月21日

Technology trends of the led lights chip

Tony Armstrong, Linear Technology Power Products Division director of product marketing, with the further development of the LED, its effectiveness or the ability continue to improve. Secondly, LED lighting have environmental protection characteristics, which no need to deal with exposure and disposed of in a common toxic mercury vapor in the cold cathode fluorescent lamp. Finally, incandescent bulbs, and often need to be replaced after about 10000 hours. However, the led lights can provide over 100,000 hours of life. These figures are outshone.

Texas Instruments (TI) Business Development Manager Han Gan analysis, it is well known that the LED driver model high ambient temperature, and the module thermal conditions is poor, leading to the LED Panel driver circuit has been working at higher temperatures, which will lead to the reliability of the led lights applications reduce, and shorten the life of a series of questions. So the heat had to highly considered. Reliability and safety regulations is very easy to ignore and part, especially before the enforcement of relevant provisions, in order to reduce costs, part of the LED lighting manufacturers will be omitted reliability and safety circuits, but this is precisely the long-term fundamental of the led lights industry developing and also the embodiment of the design capacity of LED driver chip manufactures. Different chip manufacturers provide programs, which increase the costs vary greatly.

The accumulate Technology Co., Ltd. Product Director Yu Zhongwei think that it should be noted that the shape of the trend of standardization, such as the US Energy Star and Japan PSE specification. In addition, the dimming feature is more and more noticed. Such as the traditional SCR dimming 1-10V dimming, as well as DALI dimming. Finally, it is to address the thermal issues arising from the requirements of the driver program. In addition to cost considerations, a more lightweight requirements, but also must take into account of the better electrical characteristics(efficiency, power factor, electromagnetic interference, output ripple, etc.)

Semiconductor lighting market, technical marketing manager Lin Zhiyan said LED Tube is essentially a low-voltage devices, depending on the color and the current, its forward voltage drop may vary between 2 to 4.5 V, and it requires a constant current to drive.

The perplexity faced by solar LED street lamp energy management contract model

According to the characteristic of “contract energy management”mode, a comprehensive analysis of the LED lights on the confusion of the process of implementation of  ” contract energy management “mode, and proposed the government to play a lending role, which is the current implementation of solar led street lamp in the city.

The perplexity faced by solar LED street lamp energy management contract model

As energy consumption country, China unit of GDP energy consumption is 3 times higher than in advanced countries. The production of specific power consumption of unit product is high from 50% to100% than developed countries. China is undergoing the transition from planned economy to market economy changing period. The original planned economy energy saving management system of solar led street lamp is more and more which can not adapt to the new situation, therefore, it is necessary to introduce and popularize energy-saving work based on market mechanism of energy-saving investment and service.

Energy management contract (EMC) is the arisen new energy conservation mechanism in the last century of 70’s. It is through energy service contracts signed with clients, for clients including energy audit, project design, project financing, equipment procurement, project construction, equipment installation commissioning, personnel training, recognition and energy saving service. And from the customer for energy saving in energy efficiency obtained profits of a business operation. Its essence is to reduce the energy costs to pay the full cost of energy saving project investment. This energy-saving investment mode allows the user to use the future energy-saving benefits for plant and equipment upgrades, reducing the operation costs, improving the efficiency of energy use.

The pattern has the following characteristics for solar led street lamp: one is the energy consumption enterprises without funds to complete the energy-saving technological transformation, which is so called “zero input”. second is the EMC liable for technical and economic risks, energy consumption enterprises pay to EMC payments from energy saving the project benefit, the user” zero risk”; three is the end of the contract energy saving equipment saving equipment and follow-up. and all the energy efficiency go back to energy consumption LED Downlight enterprises.

Contract energy management to a great extent handled the factors which emerged in energy conservation. It achieve win-win situation, and indeed a effective energy-saving invest mechanism, new pattern, which can be popularized quickly in the market mechanism and become the mainstream model of energy saving investment in Europe.

t8 high bay and led backlight

LED-backlit display has been a gradual increase in the proportion of the  notebook screen application, estimated that there will be more than 15% penetration rate in 2014, compared to conventional CCFL LCD screen, LED High Bay Lights (t8 high bay) has lower power consumption, thinner, better The color performance and other advantages, to meet the requirements of the consumer notebook battery work longer hours, more lightweight body, the color is more brilliant.

t8 high bay and led backlight

LED  (t8 high bay) is a way to directly convert electrical energy into light energy semiconductor components with traditional LCD CCFL light compared to the many advantages of LED backlighting technology. Notebook LCD panels, which are arranged in groups on the bottom of the form instead of the traditional thin tube. LED Lights instead of the thin tube, the original light guide plate thickness and a wedge-shaped design was canceled, and turn the light guide plate with uniform thickness and can be the thickness of the overall reducing.

The same time, the LCD system board can be placed to the bottom of the screen to integrate without superimposed on the screen, which is the reduced thickness of the entire LCD screen one of the reasons. Screen with LED backlight technology can achieve the purpose of thinner, lighter and more energy-efficient, this notebook is one of the most conform to their development, thinner and lighter has always been the direction of growth of the notebook computer products If you look at the recent Apple’s new world’s thinnest only 1.94 cm, the MacBook Air, you can feel this trend.

Notebook LCD screen with LED backlight with CCFL backlight to save power and lower power consumption makes the battery life of notebook battery capacity is unchanged longer. The other LED  (t8 high bay) with a relatively low voltage can work more secure than require high voltage to the CCFL. The display has always been a major energy consumer in the notebook computer, notebook battery life is too short, this advantage of the LED Products is attractive.

LED-backlit display screen is not perfect, the shortcomings are in terms of color saturation, in addition, its brightness is not strong enough, should be less than the current mainstream of traditional CCFL LCD brightness.